DE29825120U1 - Spray gun for spraying liquids, that is easy to clean - comprises spray nozzle, and removable and collapsible liner, that fits closely into reservoir - Google Patents

Abstract

Spray gun comprises a spray nozzle and a removable liner (35) that fits closely into a reservoir (6). The liner collapses as fluid is dispensed from the nozzle. Preferably the spray gun is gravity fed. The fluid reservoir and liner are removable and collapsible for disposal. The liner is secured to the reservoir by a removable lid. The reservoir (container) is plastic, especially polypropylene or polyethylene. The liner is semi-rigid thermo-vacuum formed plastic.

Description

The Invention relates to containers, especially disposable containers and containers, which can act as deposits. Furthermore The invention relates to devices for spraying liquids (For example, spray guns) and in particular the liquid container or tanks of such devices.

In In many different areas there are many uses for disposable containers. For example many goods are placed in disposable containers before or after purchase (eg. Bag). Is the disposable container a plastic bag, he will be from the buyer often as a disposable insert for another container reused, z. B. a trash can. In some cases Disposable pads are specifically designed for use in other, reusable containers made: in these cases The insert may be intended to dispose of the contents of the container to support (as with a deposit in a trash can); the container or to protect its contents; or cleaning the container to facilitate or even omit.

The Use of an insert in a container in which a substance such as Glue, paint or plaster mixed or contained for use can be particularly advantageous if one considers the easier cleaning of the container after use and the prevention of substances in the container through the Remains of other substances are contaminated. For example, containers, in which colors are mixed or included for use, cleaned be to ensure that the hue or the quality the color is not changed by traces of other substances: As previously explained, is This is especially important when repainting a vehicle and the paint must correspond to an existing one. To pollution problems When mixing paints are to be avoided in vehicle body shops in often practice disposable wax paper cups as a mixing container used, especially if only a small amount of paint required is. In an alternative proposed in US-A-4383635 Approach is a disposable container provided for use in a reusable frame-like Container arranged becomes.

On The field of spray guns has been proposed for various reasons that one-way insert in the tank of the gun should be used (see US-A-3211324, 3255972, 4151929, 4951875 and 5143294 and EP-A-0678334). guns for splashing liquids (eg, paints, garden chemicals, etc.) are well known and feature usually over one Tank containing a liquid to be dispensed is, and a spray nozzle, through the liquid is delivered under pressure and controlled by a trigger mechanism. From the tank, the liquid can fed by gravity be, and / or it may be in a stream of pressurized fluid, eg. For example, air or water, being carried away from an external source Gun supplied becomes.

Want a user the liquid In the tank of a spray gun, it is usually necessary to close the gun very thoroughly cleanse to ensure that no Traces of the old liquid remain in the gun and contaminate the new fluid. Especially this applies to Paint spray guns, since all traces of an old paint approach, the remain in a gun, the color of a new color approach affect so far can, that the new color approach becomes useless. Especially in vehicle body shops can This can cause problems where the vehicle is applied Often paint must correspond exactly to an existing paint. One has Alternatively, they can let paint residues dry in the gun peel and contaminate the new paint approach. However, this is cleaning of spray guns comparatively complicated and time consuming. In addition, in paint spray guns, the cleaning process includes the Use comparatively large Amounts of solvents, for environmental reasons should be handled and disposed of with care. This can be his turn considerably increase the cost of a painting process. It has already been proposed (see, for example, the aforementioned EP-A-0678334), that the Use of a disposable liner in the paint tank (ie in the ink pot) one Spray gun simplify cleaning the gun and the required Amount of solvent can reduce.

The The invention relates to the provision of a container that is sufficiently cheap is to be disposable, and preferably compressed can, if it is to be disposed of, but in use nevertheless comparatively easy to handle and to fill is. In particular, the invention relates to the provision of a such container, the is suitable for use as an insert in another container. It also concerns the invention the possible Simplification of the cleaning of spray guns u. Ä. Devices and thereby the possible Reduce the time and effort associated with this Process.

The Invention provides a container with side walls and a comparatively stiff floor made of a plastic material are hot / vacuum formed; the side walls compared to the ground thin and compressible are, but the container unsupported can stand on the ground, with the side walls upright extend.

In particular, the invention provides a container with a bottom and erstre from the ground caking sidewalls ready; wherein the bottom and the side walls of plastic material are jointly hot / vacuum formed so that the bottom is relatively stiff and the side walls are thin and compressible compared to the bottom, but the container can stand unsupported on the ground with the side walls extending upright ,

One inventive container can as deposit for a container be used, wherein the insert has a shape that the interior of the container equivalent. As a modification, the invention also provides Combination with a container one Disposable insert ready, located in the interior of the container fits and has a corresponding shape, the insert of a Plastic material is hot / vacuum molded. Preferably, but not necessarily, the deposit is compressible.

It also puts the invention provides a spray gun comprising: a fluid tank; a removable, compressible Insert having a shape corresponding to the interior of the tank, and fits in tightly; and a spray nozzle for dispensing fluid from the interior of the liner; the deposit coincides if fluid from inside the liner during operation of the gun is removed.

According to the invention is further a spray gun is provided, comprising: a fluid tank with a removable lid disposed in an opening in the tank; a removable insert that is placed inside the tank and attached to the tank by the lid at the periphery of the opening; and a nozzle for dispensing fluid from the interior of the liner; the deposit removable from the tank together with the lid.

moreover the invention provides a gravity fed spray gun, comprising: a fluid tank with a removable lid, the in an opening is arranged in the tank; and a spray nozzle for discharging fluid, the is withdrawn from the interior of the tank through an outlet in the lid; the tank is removable from the gun and stand alone can, so that fluid can be filled into the tank through the opening.

Further the invention provides a spray gun comprising: a Fluid tank; and a spray nozzle for discharging fluid from inside the tank; the tank a self-supporting container which is removable from the gun and compressible for disposal.

According to one Another aspect of the invention is a fluid tank for attachment provided on a spray gun, the tank being a removable one Lid has that in an opening is arranged in the tank and in which a fluid outlet for the tank is formed; in which the tank has a removable compressible liner which has a shape that corresponds to the tank, and fits tightly therein, wherein the liner is attached to the tank through the lid on the perimeter of the opening and removable from the tank together with the lid. Continues the invention a fluid tank for attachment to a spray gun ready, with the tank a removable lid, which is in an opening in the Tank arranged and in which a fluid outlet for the tank is formed, wherein the fluid outlet to Attachment is formed on the spray gun; and a closable vent in the End of the tank, which is removed from the lid.

According to one more Another aspect of the invention is a liner for use in Tank provided a spray gun, wherein the insert of a Plastic material is formed and fits tightly into the tank; in which the insert has a comparatively stiff bottom and side walls, thin compared to the ground and squeezable are.

It also puts the invention provides a spray gun having a fluid tank and a spray nozzle for Having discharged fluid from the interior of the tank, wherein the Tank has a removable lid and a removable, general having conical mesh filter which is fixed in the tank by the lid is.

Farther the invention provides a gravity feed spray gun comprising a fluid tank and a spray nozzle for dispensing fluid from the interior of the tank, wherein the tank has a removable lid and removable liner, which is fixed in the tank through the lid.

in the As used herein, "hot / vacuum forming" refers to a process by which heats a material web in a softened state and into a required shape shape, defined by a shape is being shaped while she is in this softened state. This includes the case in which the exercise a differential air pressure is used to shape the material to assist in the required shape shape, and in particular belongs to the case where a vacuum is generated on one side of the material is to assist in its shaping into the required shape shape (simple also known as "vacuum forming").

As used herein with respect to the sidewalls of a container / liner according to the invention, "compressible together" means that the sidewalls can be deformed so as to be deformed by the By applying moderate pressure (eg hand pressure) the edge of the container can be pushed to the bottom of the container without tearing the sidewalls.

in the Use herein to "color" all shapes more colorful Coating materials applied to a surface using a spray gun independently can be applied if they are the surface to make color. For example, these include primers, primers, Lacquers and the like Materials.

in the Following are embodiments of Invention only as examples with reference to the accompanying drawings described. Show it:

1 a perspective view of a prior art spray gun, which is shown partially disassembled, so that it can be filled with paint;

2 the components of an alternative form of paint tank for the gun of 1 in a dissolved state;

3 the color tank of 2 in an assembled state with an adapter for connecting the tank to a spray gun;

4 a longitudinal section through the paint tank and the adapter of 3 ;

5 the color tank of 4 which is attached to a spray gun;

6 the color tank of 4 in use on a spray gun;

7 Components of the paint tank of 4 which are removed after use;

8th a similar view as 2 but a modified form of color tank;

9 a longitudinal section through an alternative form of lid for the color tanks of 2 to 4 and 8th ;

10 a similar view as 2 but another modified form of color tank;

11 a part of a longitudinal section through the color tank of 10 ;

12 a spray gun similar to that of 1 but with an alternative form of color tank;

13 the gun of 12 with a modified form of color tank;

14 a modification to the tank of the gun of 13 ,

15 a 3 similar view of an alternative form of color tank;

16 and 17 modified forms of a component of 15 ;

18 the use of a holder for the color tank of 15 ;

19 a perspective view of a liner / container according to the invention;

20 a similar view, but showing the liner / container in the process of compression for disposal;

21 (a) to (C) a schematic representation of a method for producing an insert for the color tanks of 2 to 4 and 10 ;

22 a modification of the method of 21 ;

23 a color mixing jug; and

24 an insert according to the invention for use with the pitcher of 23 ,

1 The drawings show a typical paint spray gun 1 The prior art gravity feed type. The gun 1 has a body 2 , a handle 3 extending downward from the rear end of the body, and a nozzle 4 at the front end of the body. The pistol is pulled by a trigger 5 manually operated, which is rotatably mounted on the sides of the gun. The color tank or paint pot 6 , which contains paint (or similar material) to be dispensed by the gun, is on top of the body 2 arranged and communicates with an internal passage (not visible) for compressed air, passing through the gun from a connector 7 at the bottom of the handle 3 to the nozzle 4 extends. In use is the connector 7 connected to a compressed air source (not shown), so that upon actuation of the trigger 5 by the user compressed air through the gun to the nozzle 4 is guided and entrains color and atomizes the gravitational out of the pot 6 is delivered. After that, the paint gets through the nozzle 4 ejected with the compressed air as a spray.

The in the pot 6 It is often mixed by hand (which requires a separate container, such as a jug) and poured into the pot. To ensure that there are no unwanted particles in the paint that ruin the surface finish of the paint surface The color will go into the pot 6 usually poured through a filter. 1 shows the cap 8th of the pot 6 which is removed, and a conical filter 9 , which is about to be positioned on the top of the pot. As shown, the filter 9 a known type of conical disposable filter with fixed sides and a Filtermaschenabschnitt 10 at the pointed end of the cone. Is the pot 6 filled with paint, the filter becomes 9 removed and thrown away, and the cap 8th the pot is put back on. Is the filter 9 a reusable filter, it should be thoroughly cleaned like the gun before it is used with another liquid (eg a color with a different hue or a liquid with a different chemical composition).

2 illustrates the components of an alternative form of paint pot 11 on the gun 1 from 1 (or a similar pistol) instead of the pot 6 can be used. The alternative form of paint pot 11 is assembled in 3 and (in cross section) in 4 shown.

The paint pot 11 has an open container 12 , comparable in size to a conventional paint pot of a handgun, which is an air hole 12A in his bottom and with a disposable liner 13 is provided. The deposit 13 corresponds in shape to the interior of the container 12 (and fits tightly into it) and has a narrow border 14 at the open end, which sits on the upper edge of the container. Besides, the container has 12 a disposable lid 15 which is in the open end of the insert 13 is pressed. The lid 15 has a central opening 16 ( 4 ), from which a connector pipe 17 extends, which at its end with Außenansätzen 18 is provided, which form part of a bayonet connection. The opening 16 is through a filter mesh material 19 covered, which is pressed into the opening or an integral part of the lid 15 can be. On the container 12 becomes the lid 15 through a ring collar 20 firmly held in place, which is screwed onto the container on top of the lid.

The paint pot 11 gets at the spray gun 1 by using an adapter 21 attached, in 3 separated from the paint pot and in 4 (in cross-section) is shown. The adapter 21 is a tubular component attached to one end 22 inside with the other part of the bayonet connection for attachment to the connector tube 17 of the paint pot 11 is trained. On the other end 23 For example, the adapter is shaped to match the standard attachment of the spray gun paint pot (usually a screw thread).

As already mentioned, the deposit corresponds 13 of the paint pot 11 in their shape to the interior of the container 12 and has a narrow edge 14 at the open end, which sits on the upper edge of the container. As will be described later, the pad is self-supporting, but also compressible, and preferably has a comparatively stiff bottom 13A and comparatively thin side walls 13B so that they are compressed in the longitudinal direction, since the side walls and not the floor coincide. Besides, the deposit has 13 no wrinkles, ripples, seams, joints or gussets and also no groove on the inner transition of the side walls 13B with the ground 13A , An insert of this kind is based on 19 and 20 later described in more detail. In addition, a thermoforming process will be described later, by which such an insert can be made.

The container 12 of the paint pot 11 is molded from a plastic material, for. Polyethylene or polypropylene, and may be transparent (see 2 ) or opaque and of any suitable size. For use with a paint spray gun, containers of 250, 500 or 800 ml capacity could normally be used, although other sizes could be used if desired. The lid 15 is also made of a plastic material, for. Polyethylene or polypropylene, and may be molded by an injection molding process. The lid can be transparent or opaque and can be colored. The Bund 20 may be a molded plastic component or a machined metal (e.g., aluminum) component. The adapter 21 may be a machined metal component and z. B. made of aluminum and be anodized.

To the paint pot 11 to use the adapter 21 (at the end 23 ) attached to the spray gun and left in its position. Thereafter, when disassembled paint pot 11 according to 2 the deposit 13 in the container 12 pushed. Subsequently, paint is added to the container, the lid 15 is pressed in, and the covenant 20 is screwed tightly to hold the lid in place. The upper section of the insert 13 is then between the lid 15 and the container 12 captured, and the deposit edge 14 is between the top of the container and the waistband 20 captured what 4 shows. The lid is advantageous 15 barbed (not visible) on its surface to engage and hold the top edge of the insert. After that, the spray gun 1 turned from its normal operating position, so that the end of the connector tube 17 on the adapter 21 according to 5 can be fastened, after which the gun is returned to its normal position (according to 6 ) and is ready for use in the usual way. Will color from the inside of the insert 13 removed, the sides of the deposit fall as a result of the reduced Pressure within the insert. The bottom of the insert, which is stiffer, retains its shape so that the insert tends to collapse longitudinally, rather than transversely, reducing the possibility of color occlusions trapped in the insert.

The user can choose the air from inside the liner 13 to evacuate before using the spray gun 1 works, although this is not essential. However, it increases the range of angles in which the gun works satisfactorily because there is no danger of air entering the gun from the paint pot 11 entry. To evacuate the air from inside the liner 13 should the deduction 5 the pistol are operated while the pistol is still in the position according to 5 located.

If, after use, the gun is to be cleaned, the gun can be reversed again, and the trigger 5 can be pressed briefly to allow color within the gun back into the inlay in the pot 11 can expire. After that, the pot becomes 11 removed from the gun by removing the connector tube 17 from the adapter 21 is released (which remains on the gun). The Bund 20 gets from the container 12 removed, after which the lid 15 pulled out, the collapsed insert 13 with what leads 7 shows. The lid (with the filter 19 ) and the liner are thrown away, leaving the container 12 and covenant 20 clean and ready for reuse with a fresh inlay and a new lid left. Only the gun itself must be cleaned, resulting in a significant reduction in the amount of solvent used. The danger of unused paint from the pot 11 leaking is also significantly reduced, since the deposit 13 with the lid 15 removed in place and thrown away. In addition, since the insert is disposed of in a collapsed condition, the space required to collect used inserts is minimized.

As the deposit 13 as described exactly in the container 12 Fits and has a smooth inner surface, it is possible to color in the tank 12 even instead of mixing in a separate container. In this way, the cleaning of a separate mixing container can be omitted in order to achieve a further reduction of the amount of solvent used. This option does not exist when using a gravity feed gun with a conventional paint pot that comes with 6 in 1 is shown, since it is open at both ends. The possibility of the deposit 13 is pierced or damaged by the mixing tool is minimized because the insert firstly exactly in the container 12 secondly, the self-supporting nature of the liner (described later) means that it is less likely to be dragged around within the container during the mixing process. To the use of the container 12 As a mixing container, the side walls of the container can be marked with markings 25 ( 2 and 3 ), whereby the volume of the contents of the container can be determined. The general shape of the container 12 and in particular the fact that he is in the orientation according to 2 flat-bottomed and stable makes it particularly suitable for use as a mixing container, which also applies to the fact that, as already described, it is transparent. Is the container on the other hand 12 Opaque, it could be formed with slots in the side walls, through which the insert 13 could allow the user of the spray gun to adjust the amount of paint in the pot 11 can judge at any time.

When mixing paint in the container 12 prevents the inclusion of the filter mesh 19 in the container lid 15 in that undesirable particles in the paint enter the spray gun. However, the mesh material can 19 if the color is textured or if they are mixed in a separate container and transferred to the lined container 12 is poured through a sieve or if the presence of impurities in the ink is meaningless.

Although the federal government 20 of the paint pot 11 previously described as a separate item, he could use the lid 15 combined, in which case it would also be a disposable item. As another alternative, the lid could 15 (with the connector tube 17 and the mesh material 19 ) as an integral part of the deposit 13 be formed, with which he by a hinge connection 26 according to 8th could be connected. In this case, it is not necessary for the lid to fit into the mouth of the liner to ensure that the lid and liner are removed together after use from the container. However, this would still be necessary if the lid rests after use Place in the deposit should remain. As yet another alternative could be the federal government 20 to be replaced by a band around the top of the pot 11 is attached to the lid 15 and the deposit 13 to hold in place. The tape could be on the pot 11 be attached and could z. B. made of rubber or be part of a metal clip assembly of the kind, which serves for securing the closures of glasses and bottles.

Is a stronger engagement between the lid 15 from 2 to 4 and the deposit 13 required, the lid could form a snap closure with the insert instead of a representation according Eindrückverschlusses. For example, the insert could be formed with an inner circumferential rib positioned to engage a corresponding groove on the adjacent surface of the lid.

As yet another alternative could be the push-in lid 15 through a lid 27 according to the form 9 be replaced. The lid 27 is also pressed into the insert, but has a generally conical shape and corresponds at its upper end 28 in its shape the end of the connector tube 17 from 2 to 4 so he's in the same adapter 21 intervenes. The lid 27 has an outwardly extending edge 29 , the top of the insole 14 sits, and a shaped section 29A which engages in the inner surface of the insert. The shape of the shaped section 29A allows the lid 27 to push into the mouth of the insert, and also provides a recess 29B ready, in which the edge of the insert can contract, so that the lid is securely arranged. The shape of the shaped portion according to 9 however, is not essential, and alternatives could be used, including, for example, barbs as in the above description with reference to the lid 15 from 4 , On the container becomes the lid 27 by a Aufschraubbund similar to the federal government 20 held in place on the top of the rim 29 the lid is sitting. In the lid 27 can be a filter similar to the filter 19 from 2 to 5 be installed. Alternatively, in any event, the filter may be generally cylindrical so that it may be inserted into the tubular portion of the lid from the end adjacent the bayonet connection. In this case, the internal shape of the tubular portion of the lid should ensure that the filter remains in position when the spray gun is in use.

The components of an alternative form of paint pot 30 are in 10 illustrated. Like the pot 11 from 2 points the pot 30 a container 12 and a deposit 13 on. In this case, but the filter 19 of the pot 11 as a separate item 31 formed, which has a diameter, that of the container 12 corresponds, and a peripheral seal 32 having. In addition, the lid 15 and covenant 20 of the pot of 2 through a generally conical lid 33 replaced, which is screwed onto the container and at its upper end a tubular approach 34 with a similar shape as the connector tube 17 from 3 so he's in the same adapter 21 intervenes. The pot is assembled 30 by the deposit 13 in the container 12 slid and, after putting paint in the container, the filter 31 placed on top of the container and by tightening the lid 33 is fastened in its position. The edge 14 the deposit 13 and the seal 32 of the filter 31 then both are de between the lid 33 and the container 12 according to 11 captured what leakage of paint from the pot 30 prevented at this point if the pot was attached to a spray gun and turned over for use.

The adapter 21 could be omitted by the ends of the tubular parts 17 . 34 of lids of containers 11 . 30 formed with screw threads, so that they directly into the standard color pot attachment to the spray gun 1 can intervene.

12 shows an alternative spray gun, where the standard paint pot 6 the spray gun 1 (please refer 1 ) and with a deposit 35 is provided, which fits into the pot and preferably in the connection with the body 2 the gun extends to produce a liquid-tight sealant with it, e.g. By using a flexible O-ring (not visible) between the gun and the insert. In this case, the deposit falls 35 not together when paint is removed from the inside of the pot, and may be made of a stiffer material to their positioning within the pot 6 to support. Once she is in position, the insole becomes 35 through the cap 8th held in place on an outward-extending edge 36 is screwed on the open end of the insert. The pot 6 from 12 is additionally with a filter 37 provided, which has a generally conical shape and formed entirely of mesh material and in use within the liner 35 is positioned. Like the deposit 35 has the filter 37 an outwardly extending edge 38 , the top of the insole 36 lies as well as through the cap 8th of the pot 6 is held in place.

Unlike the pot 11 from 3 is the pot 6 from 12 destined to be filled with paint while holding the spray gun 1 is attached. The deposit 35 and the filter 37 are placed in their position, paint is poured into the pot, and the cap is watched. During this process there is no risk of the filter slipping, and since the filter is made entirely of mesh material, the user can always see the color level while the paint is being poured into the pot. After that is the gun 1 ready for use. Any paint released by the gun passes through the filter 37 That is why the paint does not need to be filtered when placed in the pot 6 is poured. After use, the cap becomes 8th unscrewed so that the filter 37 and the deposit 35 can be removed. The deposit 35 is thrown away, and the filter 37 is also either disposed of or cleaned, depending on whether it is a disposable item. In turn, reduces the use of the insert 35 to clean the gun 1 required amount of solvent, with a further reduction by the use of a disposable filter 37 is possible.

The filter 37 can any suitable form and z. B. have folded sides to increase the effective surface area of the filter.

In a modified arrangement according to 13 are the deposit 35 and the filter 37 to a single unit 39 combined. In this case, the filter is disposed of with the insert.

In each of the arrangements according to 12 and 13 can the deposit 35 and the filter 37 out of the pot 6 with the lid 8th be removed. In this case it is possible to use the conventional lid 8th of the pot 6 to replace with a disposable lid so that the lid 8th , the deposit 35 and the filter 37 be disposed of together.

The one-way unit 39 from 13 could be modified to the color pot 6 the spray gun 1 instead of being fitted in the paint pot. In this case, the unit could 39 as a sealed cartridge 50 which is already filled with paint, what 14 shows. From the outside the cartridge resembles 50 the paint pot 6 and can with the gun 1 be connected in the same way. But since it is sealed, the outlet end must 51 pierced the cartridge and provide a vent, z. At the other end 52 the cartridge so that paint can flow into the gun. The outlet end 51 the cartridge 50 could z. B. be pierced by the user before the cartridge (with the outlet end at the top) is attached to the (upside down) gun. Alternatively, the gun could 1 be modified so that the outlet end 51 automatically punctures when the cartridge 50 attached to the gun. Then there could be a vent on the other end 52 the cartridge 50 are formed after the cartridge has been attached to the gun by this end of the cartridge z. B. is pierced manually or by a separate cap 53 attached, which is designed so that it punctures the cartridge when it is positioned. Alternatively, a vent that simply needs to be opened when the gun is ready for use could be pre-formed in the cartridge.

After use, the cartridge 50 removed from the gun and disposed of. Because the cartridge 50 Contains a filter, the supplier does not need to filter the color before it is added to the cartridge. But if the color is filtered in advance, the filter in the cartridge 50 eliminated.

15 illustrates an alternative form of paint pot 40 for a spray gun 1 , which is a disposable article as a whole. The paint pot 40 is generally similar to the pot 30 according to 10 with the exception that the container 12 by a disposable container described below 41 is replaced and the deposit 13 eliminated.

The container 41 from 15 can be any conventional disposable container used to pick up paint and attach it to the paint pot lid 42 suitable is. For example, the container 41 be made of a thin plastic material which is preferably transparent (as shown) for the contents of the container to be visible, and preferably marks 43 on the side walls so that the volume of the contents of the container can be determined. An air hole 44 is formed in the bottom of the container together with some means for closing the air hole when needed. This device may take the form of an adhesive tape strip (not shown) which is peeled off around the hole 44 can be opened and glued again to close the hole as needed. Alternatively, a snap closure or some simple manual valve mechanism may be provided. The container 41 has an external screw thread at its open end for attachment of the lid 42 that generally the lid 33 from 10 resembles and at its upper end 42A for attachment to a spray gun (if necessary by means of a suitable adapter) is also formed. The lid 42 can be made of the same material as the container 41 prepared and also be transparent according to the presentation. A flat filter mesh material 45 , which is also a disposable item, extends over the mouth of the container 41 , The mesh material 45 may be a separate item that is at its periphery between the lid 42 and the container 41 is held, or may be formed in one piece with the lid.

To the pot 40 to use the lid 42 and the filter mesh material 45 from the container 41 removed, which is then filled with paint (taking care that the air hole 44 closed in the bottom of the container). It is unnecessary to pour the paint through a sieve when placed in the container 41 is given, and as described above, it is possible to mix the color in the container, which avoids the need for a separate container for this purpose. The lid 42 and the mesh material 45 will then be returned to their position on the container 41 brought the lid 42 gets on the (upturned) spray gun 1 attached, which is then returned to its normal position, and the air hole 44 in the bottom of the container is opened. Now the spray gun 1 be used in the usual way. After completion of the injection process, the air hole 44 closed again, the pot 40 gets off the gun 1 and then disposed of, leaving only the gun clean. Before the pot 40 can be solved, the spray gun 1 turned back and the trigger 5 The gun can be operated to allow excess paint remaining in the gun to flow back into the pot. There is enough color in the pot 40 , in any case, the pot could be sealed again (instead of disposed of) and reused.

The container is advantageous 41 of the pot so that it after use. can be compressed. In some cases it may be possible that the lid too 42 is compressible.

As an alternative, the lid could 42 a reusable component and would be cleaned with the gun. With an arrangement of this kind, it is possible that the disposable container 41 is delivered as a cartridge, which is already filled with paint and sealed by a cover that would simply be removed before the container on the lid 42 is attached. The filter mesh material 45 could be a disposable or a reusable component. As another alternative, the container could 41 and lid 42 be delivered together as a cartridge, through a removable cover at the top 42A the lid is sealed, which would be removed before the cartridge is attached to the gun. In this form, the cartridge is similar to the cartridge 50 from 14 ,

By a suitable choice of the dimensions of the lid 42 of the paint pot 40 is it possible to have a lid 42 with containers 41 different sizes to use. Then the user would in any case the container 41 choose the most appropriate amount of color. Also, it can be desirable to have a range of filters 45 with different mesh sizes so that the user can select the mesh size that best suits the type of color being used. For the filter mesh material 45 it is not essential to the shape and / or location according to 15 to have: It could be z. B. a conical shape according to 16 have, and / or it could be in the outlet of the lid 42 according to 17 be arranged. Alternatively, the filter 45 omitted when the paint is filtered before putting in the container 41 is given or if the presence of impurities in the color is unimportant.

The lid 42 does not need the exact form according to 15 to have and could z. B. by a Eindrückdeckel in combination with a -Aubschraubbund according to 2 be replaced.

Will the container 41 (with or without the lid 42 In some instances, it may be desirable for the paint / coating material to be contained within a sealed compressible liner in the cartridge. For example, this may be desirable if it is necessary to coat the paint / coating material e.g. B. of air or light to keep isolated until it has been sprayed onto the surface to be coated. The air hole 44 in the container 41 can then always remain open or can be omitted if the container 41 itself is not airtight.

Depending on the shape of the container 41 For example, it may be desirable to provide a holder in which the container can be placed to assure that it will not tip over. A suitable holder 50 according to 18 has a container portion 51 on, which has a similar shape as the container 41 has, but is slightly larger and with an enlarged bottom 52 is provided. The container 41 is in the container section 51 placed to ensure that he stays right while he is filling and / or on the spray gun 1 is attached.

Although the foregoing description relates to a paint spray gun, it should be understood that it also applies to other spray gun types, including, for example, guns of the type attached to water hoses (rather than air supply lines) for spraying such materials as garden chemicals. In addition, the description also applies to guns with suction feed, ie guns where the liquid outlet from the tank is on the top of the tank when the gun is in use, and liquid from the tank via a supply pipe by the action of the compressed air or another Pressure fluid is drawn, which flows through the gun. In this case, if an insert is provided for the tank, the structure of the insert and / or the feed tube should be such that the insert can collapse without blocking the feed tube. For example, a short feed tube may be used, provided that all air is expelled from the insert before the gun is used. Alternatively, a flexible delivery tube could be used which collapses with the insert. As a further alternative, a modified insert could be used, which has no stiff bottom, so that the insert in other ways than the deposit 13 from 2 coincides. Since the tank of such a suction supply gun is not turned over in use as with a gravity fed gun, it is possible to eliminate the air hole in the tank, as long as the connection between the tank and the gun allows air to enter the space between the tank and the gun Deposit occurs.

With renewed reference to the paint pot 11 from 2 will be the deposit below 13 together with a method by which it can be produced. In the 19 and 20 Insulated liner is preferably transparent and thermoformed from a single piece of plastic material, preferably polyethylene or polypropylene. The shape of the insert depends on the inner shape of the container 12 , The comparatively stiff ground 13A is circular, and the insert 13 is like the inside of the container 12 generally cylindrical, but tapers from the mouth to the ground 13A something inside. As the ground is too the edge section 14 comparatively stiff, but the side walls 13B are flexible and, as already described, can collapse. Nevertheless, the deposit can 13 unsupported on the floor 13A stand, with the side walls 13B upright, what 19 shows. If the deposit falls 13 Together, the comparatively stiff ground retains 13A its shape, but moves to the edge section 14 the deposit as a result of the collapse of the side walls 13B according to 20 , The side walls 13B fall together much like a plastic bag without being torn (eg by splitting, tearing or bursting).

In one form, the insert has a height of about 110 mm, a diameter at its bottom 13A of about 78 mm and a diameter at its mouth (except for the edge portion 14 ) of about 86 mm. The bottom has a thickness of about 400 microns, the edge portion 14 has a thickness of about 900 microns, and the sidewalls 13B have a thickness of about 150 microns. In another form, the insert has the same height and diameters at its bottom and mouth, but the bottom has a thickness of about 300 microns, the edge portion has a thickness of about 200 microns, and the sidewalls 13B have a thickness in the range of 50 to 250 microns.

The following is a method for producing a deposit according to 19 based on 21 (a) - (C) described. A train 60 made of low density polyethylene (LDPE) about 250 × 225 mm in size and 0.5 mm thick at its periphery in the mold frame 61 clamped a vacuum forming machine. In trade, the LDPE material z. From Plastech Extrusions Ltd., Widnes, Cheshire, England, and the vacuum forming machine used was the model "FLB 725" from CR Clarke and Company Limited, Ammanford, Carmarthenshire, Wales. However, it will be understood that any suitable plastic material could be used and that the method could be practiced with any suitable hot / vacuum forming machine.

After leveling the train 60 in their position became the heating group 62 the vacuum forming machine in a position above the web (according to 21 (a) ), and the web was heated to a soft, supple state suitable for vacuum forming. That the web had reached the appropriate temperature could be observed from the change of its appearance from milky to transparent.

After that, the heating group 62 removed, and the mold carrier plate 63 was from below the track 60 moved up, what the shape 64 brought into contact with the web to deform it in an upward direction. Here, the machine's vacuum pump was on to let air out of the space below the web 60 to remove. The upward movement of the mold carrier plate 63 It continued until the plate had reached its lifting height, at which point it reached the frame 61 seals the web 60 holds ( 21 (b) ). Form 64 had a shape in correspondence with the inner shape of the container 12 the spray gun paint pot 11 ,

The operation of the vacuum pump was continued, with the mold support plate on the frame 61 sealed, and the pressure difference between the top and bottom of the web 60 generated (this already with the top of the mold 64 in contact), to move down into contact with the sides of the mold ( 21 (c) ). Thereafter, the mold carrier plate 63 from the cooled track 60 moved away, creating a shaped section 65 remained, the desired shape of the insert 13 and no wrinkles, ripples, seams, seams or gussets or any groove on the inner transition of the side walls 13B with the ground 13A would have. After removal from the frame 61 became the train 60 around the mouth of the molded section 65 cropped to the edge 14 the deposit 13 to build. The width of the edge 14 is determined by the location at which the railway 60 is trimmed at this stage, and can be adjusted as needed.

It has been found that the method described above has a shaped section 65 (and thus a deposit 13 ), in which that part of the plastic web 60 that with the sides of the form 64 was in contact during the molding process, was substantially thinner than the part in contact with the top of the mold. The process differs from a conventional vacuum forming process, which would aim to eliminate any differences in the thickness of the molded section 65 as far as possible, with the additional step of applying air pressure to the area under the heated web 60 after step (a) of 21 to cause the web to assume a dome shape before the mold carrier plate 63 at the frame 61 Then the thickness of the web would be comparatively even when in contact with the mold 64 in step (c) of 21 emotional. General was in the process according to 21 found that for a certain size of the web 60 the size of the form 64 the thickness of the sides of the resulting insert 13 stronger than the soil affected. In other words, the size of the form 64 increased, the thickness of the bottom of the resulting insert 13 about the same, but the sides of the insert are much thinner. On the other hand, if the size of the mold is reduced, it can be seen that a point is reached at the longitudinal folds in the sides of the insert 13 occur.

Is a further reduction in the thickness of the web 60 required where they are the sides of the form 64 in step (c) of 21 contacted, can the train 60 between two thin metal plates 66 ( 22 ), if they are in the frame 61 the forming machine is clamped, each metal plate 66 a hole 67 in the place of the form 64 which is larger than the largest cross-section of the shape. The plates 66 are also in the frame 61 and then the procedure of 21 repeated. The effect of the plates 66 is that only the central portion of the web 60 directly to the heaters 62 is exposed and over the form 64 is pulled when it has been moved upwards (in this case through the holes 67 in the plates 66 ). In this way, less of the train 60 upon formation of the molded section 65 used, and the resulting deposit 13 has a slightly thinner bottom 13A and edge 14 and much thinner sidewalls 13B , It is also possible to get a comparable result by just the top plate 66 according to 22 is used.

As a modification of the method according to 22 can the plastic sheet 60 have the shape of a circular disk of material, at its periphery between the two plates 66 is strained. Depending on the size of the disc, the clamped circumference can then be the edge 14 the deposit 13 and, possibly, there is no surplus material to be cut away.

It was found that a deposit 13 , which is produced by a method based on 21 and 22 as described with reference to 20 coincides when in the spray gun tank 11 from 2 is used. The deposit 13 can also be squeezed by hand by the ground 13A the deposit to the edge 14 is pressed. It has been found that the insert is normally unsupported on its bottom 13A can stand, and this feature, albeit it for the use of the liner in the spray gun tank 11 is not essential, may be useful for storage purposes. The insert has no wrinkles, ripples, seams, joints or gussets and no groove on the inner transition of the side walls 13B with the ground 13A : Consequently, there are no places inside where material can be trapped inside the liner. Of course, the ground occupies 13A the insert some space at the bottom of the container 12 the spray gun tank 11 , and the markings on the wall of the container 12 must be positioned so that this is taken into account.

Although the deposit 13 from 19 for specific use in the paint pot 11 from 2 the same or a similar article may be used in other ways (if necessary with appropriate dimensional changes). For example, an article of in 19 also be used as a deposit in many other container forms as a spray gun tank. Often it is desirable to provide a container with a disposable liner to z. B. to keep the container clean to facilitate cleaning or to protect the container or its contents. A deposit of in 19 The type shown can be used for any of these purposes and is of particular use in containers in which substances are mixed together since there are no places on the inside of the insert where material can be trapped and left unmixed.

An article of in 19 shown type can z. Example, be used as a deposit in a container, which is intended for mixing paints in a vehicle body workshop, in which case it is an attractive alternative to the disposable cups, which are often used for it. Before painting the repaired portion of a vehicle in a body shop, the repairman must mix a paint batch with the required hue, adjusting the hue to the surrounding portion of the vehicle. The various components for a paint batch should be accurately metered by volume or weight into a suitable container by thoroughly mixing them before use. If the mixing is not so thorough or the container is not completely clean, the color tone / quality of the dye batch (and thus the repair quality) may be impaired.

So that the color mixing can be carried out expediently but effectively, a deposit of the in 19 shown type with a measuring vessel 70 according to 23 be used. The measuring vessel 70 has the shape of a jug with a spout 71 in a shaped edge 72 and a handle 73 , The pitcher is with markings 74 provided on the side walls, whereby the volume of the contents of the jug can be determined. With the help of already using 21 described method deposits of in 19 shown in such a way that they are exactly in the pitcher 70 By using such an insert, the various components can be put together for a color approach and in the jug 70 be mixed together without really coming into contact with it.

In 24 is one for use in the pitcher 70 suitable insert 75 shown. The deposit 75 has a shape that is the interior of the jug 70 corresponds, and is generally similar to the deposit 13 according to 19 with the exception that the thicker, outwardly extending edge portion 14 the latter is omitted and the side walls 76 the deposit 75 a shaped edge 77 have, who the edge 72 and spout 71 of the jug corresponds. As the deposit 75 exactly inside the jug 70 The possibility of being pierced by the mixer when mixing paint in the pitcher is minimized. In addition, since there are no locations inside the liner where material can be trapped, there is no impediment to the effective mixing of all the material that has been metered into the jug. Is the color mixed and out of the pitcher 70 transferred (for example, in the paint pot of a spray gun), the deposit 75 removed, preferably according to 20 squeezed and thrown away, giving the pitcher 70 clean and ready for further use.

Because the floor 78 the deposit 75 a certain space at the bottom of the jug 70 occupied, the marks must 74 may be positioned on the side walls of the jug so that this is taken into account. Depending on the shape of the jug 70 It may also be desirable to have a neck at the top of the insert 75 to provide that over the edge 72 of the jug can be put down. Alternatively or additionally, the insert may be desired 75 in use at the pitcher 70 seal, z. B. is provided for a certain shape of the liner and the pitcher, so that they at the edges 77 . 72 can snap into each other.

Although it is desired that the insert 75 of the jug 70 should be compressible so that it occupies less space after use, this is not essential at all. As well as the shape of the insert 75 through the shape of the interior of the container 70 In which it is to be used, there may be cases in which the insert can not stand unsupported outside the container.

As another alternative, an article of in 19 The type shown in this case has the advantage that although the walls 13B comparable in flexibility to a plastic bag, the container stands upright without assistance in filling and afterwards. The container may be of any suitable size and may be used to accommodate many different types of goods, including, for example, powders and liquids, or simply as an alternative to the plastic / paper bags that retailers receive. In any case, the container has the advantage that there are no internal points where material can be trapped in the container. Depending on the contents of the container may be desirable to close the container mouth, in which case some suitable form of closure may be provided. For example, the closure may have the shape of an inner fin on the inside of the container around half the mouth and a counter-groove also on the inside of the container around the other half of the mouth into which the rib can be pressed to close the container. In addition, the flexibility of the container walls allows 13B the walls to be pressed on the contents, which reduces the air space within the container if necessary.

If the container is to be disposed of after use, the side walls 13B be squeezed by hand by the edge 14 pushed to the ground, so that the container (now in the form according to 20 ) less space needed for disposal. As already mentioned, the side walls fall 13B similar to a plastic bag together without being torn (eg by splitting, tearing or bursting).

It will be clear that there are many other possible uses for articles in 19 kind shown there. An insert of this kind could z. Example, be used simply as an insert for a trash, in which they would offer the additional advantage to fit better in the bucket than a conventional bag-shaped insert and easier to handle, when it is removed from the bucket, as they are upright on the ground 13A stands. Similar liners could also be used in buckets or other containers for materials that cure relatively quickly (eg, glue, wax or plaster): In some cases, such material as grout is actually sold together with a mixing bucket, in which case Packaging could include a deposit pool. In some circumstances, it may be desirable to have multiple nesting inserts in place within a container so that when one insert is removed the next is already in position. In addition, since the container is intended to contain an insert, it is not essential that the walls of the container be solid: for example, the container could be in the form of a scaffold for receiving the insert.

General is in an article of in 19 shown type of soil 13A usually at least 25 μm thick, more typically at least 100 μm thick. Compared to the ground 13A are the side walls 13B so thin that they can be compressed as described to facilitate the disposal of the liner / container: Normally, the thickness of the sidewalls 138 less than half the thickness of the soil 13A and may be less than one fifth of the thickness of the soil. Depending on the materials used and the purpose of the liner / container, the sidewalls are 13A usually less than 250 μm thick.

For certain applications of an article of the 19 The type shown is the edge section 14 may not be material and may be omitted (as with the deposit of 24 ). Is not an edge 14 required, the train would 60 from 21 (c) of course, immediately adjacent to the mouth of the molded section 65 circumcised. It has been found that the self-supporting nature of the insert / the container can be maintained even if the edge portion 14 eliminated.

It should also be noted that the ground 13A a container / insert of in 19 shown type does not have to be circular, but could have a different shape, for. B. rectangular or triangular. In the case of a liner for a container, this shape may be dictated by the shape of the container, especially if the liner is to fit into its interior. In some cases, the soil does not need to be stiff.

Furthermore, it will be clear that the method according to 21 and 22 is not limited to the manufacture of liners for use in the paint pots of spray guns and can be adapted to make liners / containers for other purposes. It is clear that the process requires that the mold 64 has a slightly tapered shape, with the largest cross section at the lower end (as in FIG 21 and 22 to see), so the train 60 can be removed when the molding process is completed. In turn, the method of manufacturing a liner to fit into a container requires that the container inside be similarly tapered. The liner / container can be made of any suitable thermoplastic material that can form a thin film that is impermeable to the materials it is intended to contain. In some cases, it may be desirable to use a material that is in the form of a laminate. For certain applications, eg. As food packaging, plastics may be preferred with a low gas permeability. But for most applications are polyolefins, z. As polyethylene or polypropylene, preferred because they are relatively cheap, easily thermoformable and inert to most aqueous and organic fluids.

Claims (32)

Liquid injection device with a gravity feed spray gun and a tank ( 40 ), the tank ( 40 ) a container ( 41 ) and a removable lid ( 42 ), wherein the lid ( 42 ) is arranged so that it has an opening in the container ( 41 ) and with an outlet for transferring liquid from the tank ( 40 ) is provided to an inlet of the spray gun. Liquid injection device according to claim 1, characterized in that the container ( 41 ) is made of a plastic material selected so that contents of the container ( 41 ) and marks ( 43 ) so that the volume of the content can be determined. Liquid injection device according to claim 1 or claim 2, characterized in that a bottom of the container ( 41 ) with an air hole ( 44 ), which can be opened and closed. A liquid injection device according to claim 3, characterized in that means for opening / closing the air hole ( 44 ) is provided, which has a wiederabdichtbaren tape strip or a snap closure or a valve mechanism. Liquid injection device according to one of the preceding claims, characterized in that the tank ( 40 ) with a filter ( 45 ) arranged to filter liquid discharged from the tank ( 40 ) through the outlet in the lid ( 42 ) is taken. Liquid injection device according to claim 5, characterized in that the filter ( 45 ) in the lid ( 42 ) is arranged. A liquid injection device according to claim 5 or claim 6, characterized in that a selection of filters ( 45 ) with different mesh sizes to select a suitable mesh size is provided. Liquid injection device according to one of claims 5 to 7, characterized in that the or each filter ( 45 ) has a flat, conical or cylindrical shape. Liquid injection device according to one of the preceding claims, characterized in that the lid ( 42 ) on the container ( 41 ) is screwed. Liquid injection device according to one of claims 1 to 8, characterized in that the cover ( 42 ) in the container ( 41 ) is pressed. Liquid injection device according to claim 10, characterized in that the lid ( 41 ) is fastened by means of a Aufschraubbunds. The liquid injection device according to one of the preceding claims, characterized in that the outlet for attachment is molded on the spray gun. Liquid injection device according to one of claims 1 to 11, characterized in that an adapter is provided for attaching the outlet to the spray gun. Liquid injection device according to one of the preceding claims, characterized in that a device for sealing the tank ( 40 ) is provided when it is detached from the spray gun. Liquid injection device according to one of the preceding claims, characterized in that the container ( 41 ) and / or lid ( 42 ) is disposable after use. Liquid injection device according to one of the preceding claims, characterized in that a holder ( 50 ) is provided to the container ( 41 ) in an upright condition for filling and / or attaching the tank ( 40 ) on the spray gun. Liquid injection device according to claim 16, characterized in that the holder ( 50 ) a container section ( 51 ), which has a similar shape as the container ( 41 ), but a little bit larger and with an enlarged bottom ( 52 ) is provided. Gravity feed tank for a spray gun with a container ( 41 ) having a bottom and side walls extending from the bottom to an open bottomed end, and a removable lid (10). 42 ) for fastening to the container ( 41 ) to close the open end and provided with an outlet for transferring fluid from the tank ( 40 ) to a spray gun. Gravity feed tank according to claim 18, characterized in that in use the tank ( 40 ) is reversed to transfer fluid to the spray gun and the bottom of the container ( 41 ) with an air hole ( 44 ) is provided. Gravity feed tank according to claim 19, characterized in that the air hole ( 44 ) is suitable to be opened and closed as needed. Gravity feed tank according to one of claims 18 to 20, characterized in that a filter ( 45 ) is provided for filtering fluid coming from the tank ( 40 ) is removed through the outlet. Gravity feed tank according to claim 21, characterized in that the filter ( 45 ) in the lid ( 41 ) and a range of filters of different mesh sizes is provided to select a suitable mesh size. Gravity feed tank according to one of claims 18 to 22, characterized in that the container ( 41 ) is made of a plastic material through which the contents of the tank ( 40 ) are visible and provided with markings on the sidewalls to indicate the volume of the contents. Gravity feed tank according to one of claims 18 to 23, characterized in that the tank ( 40 ) can be sealed when detached from the spray gun to store unused paint and reconnected when the stored paint is to be used. Gravity feed tank according to one of claims 18 to 24, characterized in that the container ( 41 ) for adding fluid with the cover removed ( 42 ) can be placed upright on the ground. Gravity feed sprayer, comprising: a tank ( 40 ) with a container ( 41 ) having a bottom and side walls leading from the bottom to the open end, the bottom being an air hole ( 44 ), and the container ( 41 ) is suitable for placing in an upright condition on the ground, means for adding liquid through the open end; a lid ( 42 ) with an outlet, means for attaching the lid ( 42 ) on the container ( 41 ) to close the open end, means for connecting the outlet with a spray gun, the tank ( 40 ) is reversed to position the bottom above the outlet, the air hole ( 44 ) is opened in the ground and the spray gun is actuated to remove liquid from the tank ( 40 ) to the spray gun under gravity with open air hole ( 44 ). Apparatus according to claim 26, further comprising means for closing the air hole ( 44 ) at Spritzabschluß, turning the tank ( 40 ) to position the outlet above the floor and release the outlet from the spray gun. Apparatus according to claim 27, further comprising means for sealing the tank ( 40 ) to store unused liquid. Apparatus according to any one of claims 26 to 28, further comprising means for mixing liquid supplied to the container ( 41 ) was added. Apparatus according to any one of claims 26 to 29, further comprising a selection of filters ( 45 ) of different mesh sizes, with a filter ( 45 ) with a suitable mesh size for liquid to be sprayed and the selected filter ( 45 ) can be placed in the lid to filter liquid from the tank ( 40 ) in Ge is taken. Apparatus according to any one of claims 26 to 30, further comprising means for connecting the outlet to an inlet on the spray gun to move the tank ( 40 ) at the top of the spray gun. Device according to one of claims 26 to 31, further comprising a holder ( 50 ) for receiving the container ( 41 ) to the container ( 41 ) in the upright state.